system-config-kdump has hardcoded whitelist of major numbers for block
devices that can be used as raw kdump targets. With the current list it
does not show virtio disks  as possible targets. The major device
number for virtio is assigned dynamically, thus I cannot simply add a
I have no idea how the major numbers in the list were chosen. I see
these possibilities for fixing the bug:
* Do not try to outsmart the user, throw away the list, and offer all
devices that are listed in /proc/partitions.
* Add all the numbers that can be used for dynamic assignment to the
* Determine whether a device is suitable by some other means. For
example, /sys/dev/block/MAJOR:MINOR/ro should contain 1 if the device
is read-only. However it contains 0 for my optical drive, so using
this is probably not as useful.
I'll be grateful for any suggestions,